Cant open the project

I made a version with newer build tools: https://github.com/apptheism/CycleOfLife as exercise.

Hmm... there's probably something in that project's 'build.gradle' file that isn't on your system. Try creating a new project, and then comparing the 'build.gradle' files of this project with your new project. Then update any version numbers in this project to reflect what you see in the new project*. I actually troubleshoot opening a Github project in this video (around the 3 minute mark is where I get the first issue).

*whatever versions are in the new project are pretty much guaranteed to be a version you have installed

Just like Ben mentioned differences between your system and what the project was built in, your system probably has either an older or higher version of Build Tools installed. Just install version 23.0.0 through the sdk manager and you should be good to go.

Ben Deitch and Javier Mera both have sound advice.

I didn't have version 23 of the sdk installed, so I thought that was the first requirement, though after later steps it became irrelevant.

Next I was getting the message "Unsupported method: BaseConfig.getApplicationIdSuffix(). The version of Gradle you connect to does not support that method." I resolved this by: 1.) opening the build.gradle file (I had to use project view) and changing the classpath dependency to 'com.android.tools.build:gradle:3.2.1' (what shows up in a new project) 2.) I got an error about not being able to find that that dependency, and used the suggested fix action "Add google maven repository and sync project" 3.) got an error about the minimum verison of gradle and a problem with the gradle wrapper; applied the suggested fix action "fix gradle wrapper and reimport project"

After that, I was good to go, but got some warnings about deprecated methods and their pending removal. E.g. "WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'." Those are just warnings though, and I was still able to run the app. They are pretty straightforward to fix if you were updating this project to use the latest version of gradle, just a matter of following the warning and looking at the documentation I believe. That and a warning about the minimum supported version of the Android SDK build tools for the version of the gradle plugin I am using, see Build > Sync.

I hope that helps!

In the individual module build.gradle file:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "25.0.0"

    defaultConfig {
        applicationId "com.teamtreehouse.activitylifecycleexample"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.0.1'
}

In the top-level build.gradle build file:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.2'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}